CN101622452B

CN101622452B - Hydraulic device

Info

Publication number: CN101622452B
Application number: CN2008800067004A
Authority: CN
Inventors: 桑原信也; 藤吉直志
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2007-07-19
Filing date: 2008-07-18
Publication date: 2011-12-14
Anticipated expiration: 2028-07-18
Also published as: US20100202902A1; WO2009011429A1; JP4670844B2; JP2009024585A; US8051763B2; CN101622452A

Abstract

The invention provides a hydraulic device. In the hydraulic device, a first rotation member (25) and a second rotation member (36) are arranged so as to be rotatable relative to each other about the same center axis (O), the first rotation member (25) is provided with a cam (26), pistons (38a-38h) are arranged on the second rotation member (36) so as to be opposite to the cam (26), the pistons (38a-38h) are pressed to be in contact with the cam (26) by compression coil springs (40a-40h), and the second rotation member (36) is provided with oil chambers (41a-41h) whose volume increases and decreases as the pistons (38a-38h) move. The hydraulic device further has a first fluid passage and a second fluid passage through which oil flows into or is discharged from the oil chambers (41a-41h), and also has a passage switching device (8) for switching the inflow direction and the discharge direction of oil in the first and second fluid passages depending on the pressure difference between the first and second fluid passages.

Description

Hydraulic pressure installation

Technical field

The invention particularly relates to the employed hydraulic pressure installation of automatic transmission of vehicle.

Background technique

As hydraulic pressure installation, for example have to suck and ejection working fluid and radial piston pump that working fluid is supplied with to the part of necessity, this hydraulic pressure installation is documented in the following patent documentation 1.The radial piston pump that this patent documentation 1 is put down in writing is as lower device, on shell, be provided with valve shaft with suction port and ejiction opening and suction tank and ejection groove, rotate support rotor freely with respect to this valve shaft, and the outer sideway swivel at this rotor is provided with cam ring freely, be located at oil hydraulic cylinder on the rotor radially, piston can be inlaid in this oil hydraulic cylinder slidably, form the pump chamber that optionally is communicated with suction tank and ejection groove thus.Therefore, working fluid is inhaled into the pump chamber by suction tank from suction port, is ejected into ejiction opening by the ejection groove.

And, there is following situation: such radial piston pump is built in the automatic transmission of vehicle, the rotor of radial piston pump is connected in any one party of input shaft and output shaft, the cam ring of radial piston pump is connected in any the opposing party of input shaft and output shaft, radial piston pump as the oily oil pump of rotational speed difference ejection by input shaft and output shaft, is promptly used as differential oil pump.Under this situation, when rotational speed ambassador's input shaft of such rotational speed specific output axle that is to say input shaft when just driving is relatively for positive rotation when the acceleration of vehicle, thereby the radial piston pump work can spray working fluid.But, when engine brake acts on being driven on the vehicle, when the rotational speed of the rotational speed specific output axle of input shaft makes input shaft for a short time relatively for contrary rotation, suction stroke and ejection stroke based on the working fluid of piston become on the contrary, and radial piston pump can not spray working fluid.

Therefore, for example, in following patent documentation 2, can suitably spray working oil when using safety check in the positive rotation of input shaft and against rotation.That is, in the oil pump of this patent documentation 2, can suitably spray working oil during contrary rotation of oil pump.Promptly, in the oil pump of this patent documentation 2, the suction port of oil pump is connected in liquid via first safety check and accumulates portion, and the ejiction opening of oil pump is connected in ejection liquid via second safety check and requires portion, in addition, the ejiction opening of oil pump is connected in liquid via the 3rd safety check and accumulates portion, and the suction port of oil pump is connected in ejection liquid via the 4th safety check and requires portion, when the oil pump positive rotation, only make first and second safety check towards the direction configuration of opening, when the contrary rotation of oil pump, only make the 3rd and the 4th safety check towards the direction configuration of opening.Therefore, no matter the sense of rotation of motor how, and oil pump can both spray predetermined flow.

In the existing oil pump that above-mentioned patent documentation 2 is put down in writing, suction port and ejiction opening at oil pump are provided with a plurality of safety check, when the oil pump positive rotation, one side's safety check is opened, when the contrary rotation of oil pump, the opposing party's safety check is opened, thereby no matter how the sense of rotation of motor can both spray oil.But, safety check is the parts that just can open when the pressure when oil surpasses predetermined pressure, so the pressure loss of oil is big, exist in when oil sucks cavitate easily, work bad (cam the misses timing (Shan Fly び) phenomenon of piston), and the such problem of mechanical efficiency reduction.

In addition, differential oil pump be according to the rotational speed of two solid of rotation suck and ejection as the parts of the oil of working fluid, wish it as under the state that has retrained a solid of rotation, supplying with oil and obtaining the motor use of power by rotating another solid of rotation.But above-mentioned oil pump in the past is owing to suction port and the ejiction opening at oil pump is provided with a plurality of safety check, so be difficult to make the function of its performance as motor.

Patent documentation 1: Japanese kokai publication hei 02-108866 communique

Patent documentation 2: Japanese kokai publication hei 09-303256 communique

Summary of the invention

The object of the present invention is to provide a kind of hydraulic pressure installation, its no matter the sense of rotation of rotary component how can both supply with fluid efficiently, realize the raising of mechanical efficiency, and realize the raising of versatility.

Hydraulic pressure installation of the present invention has: have central hub, relative rotation the 1st rotary component and the 2nd rotary component of setting freely; Be arranged at the cam of described the 1st rotary component; On described the 2nd rotary component, relatively dispose and the radially mobile piston that is provided with freely with described cam; Described piston is pushed so that its press part that contacts with described cam; Be arranged at described the 2nd rotary component, be accompanied by the fluid chamber that the mobile volume of described piston enlarges/dwindles; Flow into or discharge the 1st fluid passage and the 2nd fluid passage of fluid with respect to described fluid chamber; With pressure difference, to the inflow direction of the fluid in described the 1st fluid passage and described the 2nd fluid passage and discharge the path switching device that direction is switched according to described the 1st fluid passage and described the 2nd fluid passage.

In one embodiment, preferably: described path switching device has moving body, this moving body moves according to the pressure difference of described the 1st fluid passage and described the 2nd fluid passage, thus the inflow direction and the discharge direction of the fluid in described the 1st fluid passage and described the 2nd fluid passage is switched.

In one embodiment, preferably: described moving body moves freely in the 1st mobile position and the 2nd mobile position, and be bearing in described the 1st mobile position by the application of force by application of force unit, described the 1st mobile position be with described the 1st fluid passage as the discharge direction of fluid and described the 2nd fluid passage is switched to the position of the inflow direction of fluid, described the 2nd mobile position is as the inflow direction of fluid and described the 2nd fluid passage is switched to the position of the discharge direction of fluid with described the 1st fluid passage.

In one embodiment, preferably: input shaft is connected in described the 1st rotary component, input shaft is connected in described the 2nd rotary component, described application of force unit, with when the rotational speed of described the 1st rotary component is higher than the rotational speed of described the 2nd rotary component, make the mode of the increased pressure of described the 1st fluid passage that is communicated with the fluid supply unit or described the 2nd fluid passage carry out application of force supporting to described moving body.

In one embodiment, preferred: described path switching device comprises: housing; The 1st port and the 2nd port that be arranged at described housing, are communicated with described the 1st fluid passage and described the 2nd fluid passage; Be arranged at described housing, the inhalation port that is communicated with fluid suction path and fluid drain passageway and discharge port; The guiding valve that in described housing, is moved freely supporting, the connected relation of described the 1st port and described the 2nd port and described inhalation port and described discharge port is switched; Be arranged at described housing, make the pressure of described the 1st fluid passage act on the 1st pressure port of described guiding valve; Be arranged at described housing, make the pressure of described the 2nd fluid passage act on the 2nd pressure port of described guiding valve.

In one embodiment, preferred: described path switching device comprises: the inboard at described the 2nd rotary component is rotated the solid of rotation of supporting freely with one heart; Be arranged at described solid of rotation, suck the suction chamber that path is communicated with and can be communicated with described the 1st fluid passage or described the 2nd fluid passage with fluid; The discharge chamber that is arranged at described solid of rotation, is communicated with the fluid drain passageway and can be communicated with described the 1st fluid passage or described the 2nd fluid passage; Make the pressure of described the 1st fluid passage act on the 1st pressure chamber that described solid of rotation can rotate it; Act on described solid of rotation with the pressure that makes described the 2nd fluid passage and make its 2nd pressure chamber that can rotate,

Described path switching device can switch according to the rotational position of the described solid of rotation connected relation to described the 1st fluid passage and described the 2nd fluid passage and described suction chamber and described discharge chamber.

In one embodiment, preferably: described path switching device sucks path via fluid and is connected in the fluid storage part, and be connected in the fluid supply unit via the fluid drain passageway, the control valve that the flow of convection cell is controlled is set on described fluid sucks at least one side in path or the described fluid drain passageway.

In one embodiment, preferably: input shaft is connected in the side in described the 1st rotary component and described the 2nd rotary component, output shaft is connected in the opposing party, rotational speed by described the 1st rotary component and described the 2nd rotary component is poor, described piston is moved back and forth, the pressure change of described fluid chamber is carried out the suction and the discharge of fluid by described the 1st fluid passage and described the 2nd fluid passage thus.

In one embodiment, preferred: setting can retrain the constraint element of described the 1st rotary component or described the 2nd rotary component and can will supply with the fluid feed unit of fluid to described the 1st fluid passage or described the 2nd fluid passage.

The effect of invention

According to hydraulic pressure installation of the present invention, no matter how the sense of rotation of rotary component can both supply with fluid efficiently, can realize the raising of mechanical efficiency, and can realize the raising of versatility.

Description of drawings

Fig. 1 is the summary construction diagram of the oil pump of the related hydraulic pressure installation of expression embodiments of the invention 1.

Fig. 2 is the II-II sectional drawing of Fig. 1.

Fig. 3 is the summary construction diagram of the drive transmission systems of the expression vehicle that is suitable for the oil pump that embodiment 1 is arranged.

Fig. 4 is the summary structural drawing of the oil pump of the related hydraulic pressure installation of expression embodiments of the invention 2.

Fig. 5 is the V-V sectional drawing of Fig. 4.

Fig. 6 is the VI-VI sectional drawing of Fig. 4.

Fig. 7 is the sectional drawing of the path of the solid of rotation in embodiment 1 the oil pump when switching.

Fig. 8 is the sectional drawing of rotational position of the solid of rotation in expression embodiment's 1 the oil pump.

Fig. 9 is the summary construction diagram of path switching device of the oil pump of the hydraulic pressure installation that is applicable to that expression embodiments of the invention 3 are related.

Figure 10 is the summary construction diagram of path switching device of the oil pump of the hydraulic pressure installation that is applicable to that expression embodiments of the invention 4 are related.

Figure 11 is the summary construction diagram of the oil pump of the related hydraulic pressure installation of expression embodiments of the invention 5.

Description of reference numerals

11 motors, 12 bent axles

14 input shafts (input shaft), 15 main shafts

17 housings, 22,111,151 oil pumps (hydraulic pressure installation)

25 first rotary components, 26 cams

27,112 rotary valves, 29 first intercommunicating pores

30a, 30b second intercommunicating pore 32 first oil circuits

33 second oil circuit 34a～34d, 113a～113d connecting groove

35a～35d, 114a～114d attachment hole 36 second rotary components

37a～37h oil hydraulic cylinder 38a～38h piston

39a～39h roller 40a～40h compression disc spring (pushing portion)

41a～the 42a of 41h grease chamber～42h attachment hole

45 output shafts (output shaft), 51 forward-reverse switching devices

58 stepless speed variators, 71 electric control devices, ECU

81 hydraulic control devices, 82 oily storage parts (fluid storage part)

83 first oil suck path (fluid suction path)

84 oily supply units (fluid supply unit)

85 first oily drain passageways (fluid drain passageway)

86,131,141 path switching devices, 89 second oil suck path (fluid suction path)

90 second oily drain passageways (fluid drain passageway)

87 control valves, 91 shells

97 guiding valves (moving body), 115 solid of rotation (path switching device, moving body)

116

discharge chamber

117a, 117b suction chamber

121a～121d, 122a,

122b attachment hole

123a, 123b first pressure chamber

124a, 124b second pressure chamber 142 compression disc springs (application of force unit)

152 breaks (constraint element), 153 hydraulic powers (fluid feed unit)

Embodiment

The present invention relates to be used for the hydraulic pressure installation of the automatic transmission of vehicle, is the device that can use as pump, power transmitting deice, motor.This pump carries out relative the rotation by making first rotary component with second rotary component, and is reciprocating along cam face by making piston, can be to inner suction stream body then to outside ejecting fluid.Power transmitting deice, with transmission of power to the first rotary component or second rotary component, by making this first rotary component carry out relative the rotation with second rotary component, make piston reciprocating along cam face, and by the engage power of piston with cam, can be between first rotary component and second rotary component transferring power.Motor makes pistons work by to inner supply flow body and to outside discharge currents body, and by the engage power of this piston with cam, first rotary component can carry out relative the rotation and outputting power with second rotary component.

Preferably, first rotary component and second rotary component of rotation relatively freely are set, on this first rotary component, cam is set, and the piston that relatively radially moves freely with cam is set on second rotary component, and, this piston is pushed so that it contacts with cam by pushing portion, the mobile volume expansion of following piston or the fluid chamber that dwindles are set on second rotary component, the first fluid path and second fluid passage that setting flows into or discharges with respect to this fluid chamber's fluid, the path switching device that setting is switched by the inflow direction and the discharge direction of the pressure difference convection cell of this first fluid path and second fluid passage.In view of the above, pass through path switching device, with the pressure difference of the first fluid path and second fluid passage accordingly, the inflow direction of switch fluids and discharge direction, thus, no matter how the sense of rotation of rotary component can both supply fluid to predetermined oil circuit, and mechanical efficiency is further improved, and, play a role by making its device as outputting power, can improve versatility.

Preferably, path switching device has moving body, and this moving body moves according to the pressure difference of the 1st fluid passage and the 2nd fluid passage, thus the inflow direction and the discharge direction of the fluid in the 1st fluid passage and the 2nd fluid passage is switched.In view of the above, pressure difference according to the first fluid path and second fluid passage moves moving body, thus, can switch the inflow direction and the discharge direction of the fluid in each fluid passage, can suitably carry out the suction and the ejection of fluid by simple structure.

Preferably, moving body can move freely in first mobile position and second mobile position, and be supported on first mobile position by the application of force by application of force unit, wherein, described first mobile position switches to the first fluid path discharge direction of fluid and second fluid passage is switched to the inflow direction of fluid, shown in second mobile position first fluid path is switched to the inflow direction of fluid and second fluid passage is switched to the discharge direction of fluid.In view of the above, pressure difference according to the first fluid path and second fluid passage, moving body is moved in first mobile position and second mobile position, thus, can switch the inflow direction and the oily discharge direction of pressure of pressing oil, by simple structure, and by simple action just can make the locality press oil suction and ejection.

Preferably, on first rotary component, be connected with input shaft, on second rotary component, be connected with input shaft, when application of force unit is the high high speed of rotational speed than second rotary component in the rotational speed of first rotary component,, the mode that the pressure of the first fluid path that is communicated with the fluid supply unit or second fluid passage uprises supports so that carrying out the application of force to moving body.In view of the above, moving body is supported by the application of force unit application of force, thus, when initiating, can prevent the adverse current of fluid, and ejecting fluid as early as possible, in addition, and simplification that can implementation structure.

Preferably, path switching device comprises: housing; Be arranged at housing, the 1st port that is communicated with the 1st fluid passage and the 2nd fluid passage and the 2nd port; Be arranged at housing, the inhalation port that is communicated with fluid suction path and fluid drain passageway and discharge port; In housing, be moved freely supporting, to the 1st port and the 2nd port and inhalation port and discharge the guiding valve that the connected relation of port switches; Be arranged at housing, make the pressure of the 1st fluid passage act on the 1st pressure port of guiding valve; Be arranged at housing, make the pressure of the 2nd fluid passage act on the 2nd pressure port of guiding valve.In view of the above, the hydraulic pressure of the first fluid path and second fluid passage is acted on the guiding valve by each pressure port, thus, move on first mobile position or second mobile position according to its pressure official post guiding valve, by moving of this guiding valve, can the connected relation of first mouthful and second mouthful and suction port and exhaust port be switched, can suitably carry out the suction and the ejection of fluid.

Preferably, path switching device comprises: the inboard at the 2nd rotary component is rotated the solid of rotation of supporting freely with one heart; Be arranged at solid of rotation, suck the suction chamber that path is communicated with and can be communicated with the 1st fluid passage or the 2nd fluid passage with fluid; The discharge chamber that is arranged at solid of rotation, is communicated with the fluid drain passageway and can be communicated with the 1st fluid passage or the 2nd fluid passage; Make the pressure of the 1st fluid passage act on the 1st pressure chamber that solid of rotation can rotate it; Act on solid of rotation with the pressure that makes the 2nd fluid passage and make its 2nd pressure chamber that can rotate, path switching device can switch the 1st fluid passage and the 2nd fluid passage and suction chamber and the connected relation of discharging the chamber according to the rotational position of solid of rotation.

In view of the above, thus space utilization efficient improve can implement device miniaturization, and, owing to can guarantee that the opening area of oil circuit is bigger, so, can further suppress the pressure loss, in addition, because the relative rotation freely of solid of rotation with second rotary component, so, can prevent that work is bad.

Preferably, path switching device sucks path via fluid and is connected in the fluid storage part, and be connected in the fluid supply unit via the fluid drain passageway, the control valve that the flow of convection cell is controlled is set on fluid sucks at least one side in path or the fluid drain passageway.In view of the above, control in the amount of flow that fluid sucks a side convection cell of path or fluid drain passageway by control valve, thus, can adjust the moment of torsion transmission capacity between first rotary component and second rotary component, the suction and the ejection of oil can be suitably carried out, and the moment of torsion transmission between first rotary component and second rotary component can be suitably carried out.

Preferably, input shaft is connected in the side in the 1st rotary component and the 2nd rotary component, output shaft is connected in the opposing party, rotational speed by the 1st rotary component and the 2nd rotary component is poor, piston is moved back and forth, the suction and the discharge of fluid are carried out in the pressure change of fluid chamber thus by the 1st fluid passage and the 2nd fluid passage.In view of the above, can guarantee the spray volume of suitable oil based on the rotational speed difference of first rotary component and second rotary component.

Preferably, setting can retrain the constraint element of the 1st rotary component or the 2nd rotary component and can will supply with the fluid feed unit of fluid to the 1st fluid passage or the 2nd fluid passage.In view of the above, under the state that first rotary component or second rotary component is retrained by constraint element, supply fluid to the first fluid path or second fluid passage makes its rotation by the fluid feed unit, thus, can make the function of its performance as motor.

Below, the embodiment to the hydraulic pressure installation among the present invention is elaborated with reference to accompanying drawing.In addition, the present invention is not limited by this embodiment.

Embodiment 1

Fig. 1 is the summary construction diagram of the oil pump of the related hydraulic pressure installation of expression embodiments of the invention 1, and Fig. 2 is the II-II sectional drawing of Fig. 1, and Fig. 3 is the summary construction diagram of drive transmission systems of the vehicle of the expression oil pump that is suitable for embodiment 1.

In the drive transmission systems of the vehicle of the hydraulic pressure installation that is suitable for embodiment 1, as shown in Figure 3, constitute: be provided with the motor 11 as prime mover, be connected with input shaft 14 via dampening arrangement 13 on the bent axle 12 of this motor 11, Engine torque is passed to input shaft 14.

Input shaft 14 rotates supports main shaft 15 freely at its outer circumferential side relatively by a plurality of bearing 16a, 16b, 16c, 16d.Input shaft 14 and main shaft 15 are configured in the housing 17.This housing 17 constitutes by not shown connecting bolt and engages fixedly front case 18, middle casing 19 and rear case 20.And, on front case 18, middle casing 19 and rear case 20, be provided with at internal surface continuous

next door

18a, 19a, 20a, 20b, on this

next door

18a, 19a, 20a, 20b, be supported with main shaft 15 and make its rotation freely via bearing 21a, 21b, 21c.

In the inside of housing 17, in the space that

next door

20a, 20b by rear case 20 surround, be formed with the first accommodation chamber A1.In this first accommodation chamber A1, be equipped with oil pump 22 as the hydraulic pressure installation of present embodiment.This oil pump 22 is a radial piston pump.

In this oil pump 22, as shown in Figures 1 and 2, on the 20b of the next door of rear case 20, the sleeve pipe 23 that supports cylindrical shape via bearing 16d makes its rotation freely.This sleeve pipe 23 is fixed with the swivel plate 24 of rounded shape on its lip part 23a, be fixed with first rotary component 25 of cylindrical shape on this swivel plate 24.And, on the inner peripheral surface of this first rotary component, be provided with cam 26.This cam 26 constitutes, interconnected on circumferentially, slick and sly footpath continuously the make progress relative first camming surface 26a, 26c and the second camming surface 26b, 26d.Under this situation, be set at distance till making from the central axis O of first rotary component 25 to the first camming surface 26a, 26c than the distance till from the central axis O of first rotary component 25 to the second camming surface 26a, 26c.

In addition, engaging on swivel plate 24 has rotary valve 27, and the end plate 28 that is integrally formed on the end of input shaft 14 is embedded in the outer circumferential face of this rotary valve 27, is one thereby engage.

Rotary valve 27 is formed with first intercommunicating pore 29 from the end face of one side to its central part, and is formed with two

second intercommunicating pore

30a, 30b at the outer circumferential side of this first intercommunicating pore 29.And, the holder 31 of cylindrical shape runs through in the sleeve pipe 23, its end is chimeric to be fixed in first intercommunicating pore 29, thereby form first oil circuit 32 from the internal communication of holder 31 to first intercommunicating pore 29, and, form from being communicated to second oil circuit 33 of the

second intercommunicating pore

30a, 30b between sleeve pipe 23 and the holder 31.In addition, rotary valve 27, along circumferentially being formed with four connecting

groove

34a, 34b, 34c, 34d, first intercommunicating pore 29 and connecting

groove

34a, 34c are communicated with by

attachment hole

35a, 35c at its outer circumferential face, and the

second intercommunicating pore

30a, 30b and connecting

groove

34b, 34d are communicated with by

attachment hole

35b, 35d.

This rotary valve 27 is at chimeric freely second rotary component 36 that cylindrical shape is arranged of its outer circumferential face rotation.This second rotary component 36 circumferentially equally spaced is formed with eight oil hydraulic cylinder 37a～37h of opening laterally on its peripheral part, piston 38a～38h is supported along radially moving freely of rotary valve 27 in each oil hydraulic cylinder 37a～37h.And, at the front end of this each piston 38a～38h roller 39a～39h being installed, this roller 39a～39h is that the center rotation is supported freely with the axis with the parallel to an axis of rotary valve 27.In addition, clamp the compression disc spring 40a～40h as pushing portion in each oil hydraulic cylinder 37a～37h, each compression disc spring 40a～40h makes it contact

camming surface

26a, 26b, 26c, the 26d of cam 26 by roller 39a～39h that its active force pushes each oil hydraulic cylinder 37a～37h.

That is, each piston 38a～38h is configured to that the cam 26 with first rotary component 25 is relative diametrically, and the active force by each compression disc spring 40a～40h makes roller 39a～39h contact with

camming surface

26a, 26b, 26c, the 26d of cam 26.And, between each piston 38a～38h and each oil hydraulic cylinder 37a～37h, be formed with the airtight 41a～41h of grease chamber, at first rotary component 25 during with the 36 relative rotations of second rotary component, each piston 38a～38h moves back and forth via roller 39a～39h and by

camming surface

26a, 26b, 26c, 26d, makes that the volume of the 41a～41h of grease chamber enlarges/dwindle.In addition, the 41a～41h of this grease chamber can be communicated with connecting groove 34a～34d by attachment hole 42a～42h.

In addition, on the planar surface portion of a side of second rotary component 36, be fixed with the connecting cylinder 43 of cylindrical shape.And on the 20a of the next door of rear case 20, support the dunnage 44 that is circular plate shape via bearing 21c and make its rotation freely, the chimeric end that the output shaft 45 of cylindrical shape is arranged in the through hole 44a of this dunnage 44, engaging by mating part 46 is one.And the peripheral part that is formed on the lip part 44b on the dunnage 44 is chimeric with respect to the interior perimembranous of connecting cylinder 43 by spline 47, and connecting cylinder 43 is that second rotary component 36 can one be connected rotatably with output shaft 45 with dunnage 44.In addition, between the planar surface portion of the opposite side of second rotary component 36 and swivel plate 24, clamp bearing 48, between connecting cylinder 43 and dunnage 44, clamped bearing 49, between input shaft 14 and output shaft 45, clamped bearing 16c.

As shown in Figure 3, in the inside of housing 17, in the space that the next door 20a by the next door 19a of middle casing 19 and rear case 20 is surrounded, be formed with the second accommodation chamber A2.In this second accommodation chamber A2, be equipped with forward-reverse switching device 51.This forward-reverse switching device 51 is that it is configured between motor 11 and the oil pump 2 with the sense of rotation of the main shaft 15 sense of rotation device for switching between positive veer and reverse directions with respect to output shaft 45.

This forward-reverse switching device 51 has planetary gears, has individual gears type planetary gears specifically.That is, this planetary gears by sun gear 52, with the internal gear 53 of this sun gear 52 configuration on same axle, with a plurality of small gears 54 of sun gear 52 and internal gear 53 engagements and support this small gear 54 make its can rotation and the planet carrier 55 of revolution constitute.And sun gear 52 is driven and is connected in main shaft 15, and internal gear 53 is driven and is connected in output shaft 45.In addition, be provided with the rotatable member that constitutes forward-reverse switching device 51 connection and the forward clutch 56 controlled of disengaging (liberation) each other, and be provided with to the rotation of rotatable member and stop to control retreat usefulness break 57.This forward clutch 56 can to sun gear 52 and internal gear 53 be connected and disengaging is controlled, retreat with break 57 and to stop to control to the rotation of planet carrier 55.

In addition, as above-mentioned forward clutch 56, can be suitable for friction clutch, magnetic clutch, engaging clutch etc.; As retreating, can be suitable for friction brake, electromagnetic brake, engage brake etc. with break 57.And, when suitable friction clutch, engaging clutch, friction brake, engage brake, be suitable for hydraulic controlling type actuator (driver); When suitable magnetic clutch, electromagnetic brake, be suitable for the electromagnetic control type actuator.In the present embodiment, use the hydraulic controlling type actuator that friction clutch (engaging clutch) and friction brake (engage brake) are controlled.

In addition, in the inside of housing 17, in the space that the next door 19a by the next door 18a of front case 18 and middle casing 19 is surrounded, be formed with the 3rd accommodation chamber A3.In the 3rd accommodation chamber A3, be equipped with stepless speed variator 58.This stepless speed variator 58 is that the rotational speed of main shaft 15 is carried out stepless change and the speed after the speed change is passed to the device of countershaft 59, and it is configured between motor 11 and the forward-reverse switching device 51.

This stepless speed variator 58 is a variable v-belt drive, has above-mentioned main shaft 15 and countershaft 59, and this main shaft 15 and countershaft 59 rotate in a parallel manner and be supported on freely on next door 18a, the 19a.On main shaft 15, be provided with can one the main pulley (pulley) 60 of rotation, on countershaft 59, be provided with can the one rotation secondary pulley 61.And what be wound with ring-type between this main pulley 60 and secondary pulley 61 is with 62.

This main pulley 60 have with fixed pulley (static pulley) 60a of main shaft 15 one and main shaft 15 axially on move freely movable sheave (movable pulley) 60b, what be wound with ring-type betwixt is with 62.And, be provided with make movable sheave 60b main shaft 15 axially on mobile phase, first hydraulic servomechanism 63 that separate approaching for fixed pulley 60a.On the other hand, secondary pulley 61 have with the fixed pulley 61a of countershaft 59 one and countershaft 59 axially on move freely movable sheave 61b, what be wound with ring-type betwixt is with 62.And, be provided with make movable sheave 61b countershaft 59 axially on mobile phase, second hydraulic servomechanism 64 that separate approaching for fixed pulley 61a.By this each

hydraulic servomechanism

63,64, main pulley 60 and secondary pulley 61 are changed with respect to the clamped position with 62, can infinitely change gear ratio thus.

And, be provided with the gear drive 65 and the differential mechanism 66 of the moment of torsion that transmits countershaft 59 in the inside of housing 17, on differential mechanism 66, be connected with wheel 68 via live axle 67.

Therefore, on vehicle, be provided with the electric control device (ECU) 71 that this vehicle integral body is unified to control.Promptly, be provided with the speed probe 77 of ignition switch 72, accel sensor 73, break stroke sensor 74, engine rotation speed sensor 75, engine load sensor 76, input shaft 14, the speed probe 78 of main shaft 15, the speed probe 79 and the shift position sensor 80 of countershaft 59, to this testing signal of input among the CU71.

In addition, on vehicle, be provided with the hydraulic control device 81 that above-mentioned oil pump 22, forward-reverse switching device 51 and stepless speed variator 58 etc. are controlled, can control by ECU71.This hydraulic control device 81, be connected with and oily storage part (fluid storage part, for example, food tray) 82 first oil that link to each other suck path (fluid suction path) 83, and, be connected with the first oily drain passageways (fluid drain passageway) 85 that link to each other with oily supply unit (fluid supply unit, for example, the hydraulic control portion of forward-reverse switching device 51, stepless speed variator 58 etc.) 84.In addition, hydraulic control device 81 is connected in this oil pump 22 via path switching device 86 that oil pump 22 is controlled and control valve 87.

Promptly, as shown in Figures 1 and 2, on the oil pump 22, as with respect to the 41a～41h of fluid chamber, oil (hydraulic oil as fluid, oil) the first fluid path that flows into or discharge is provided with first oil circuit 32, first intercommunicating pore 29,

attachment hole

35a, 35c, connecting

groove

34a, 34c and attachment hole 42a～42h; And be provided with second oil circuit 33, the

second intercommunicating pore

30a, 30b,

attachment hole

35b, 35d, connecting

groove

34b, 34d and attachment hole 42a～42h as second fluid passage.Path switching device 86 switches the inflow direction of the fluid in the first fluid path and second fluid passage and discharges direction according to the pressure difference of this first fluid path and second fluid passage.In addition, the amount of flow of the oil in 87 pairs of oily peripheral passages 88 of control valve is controlled.

In path switching device 86, shell 91 is hollow shape, is formed with first mouthful 92 of being communicated with first oil circuit 32 as the first fluid path and second mouthful 93 of being communicated with second oil circuit 33 as second fluid passage.In addition, on shell 91, be formed with suction port 94 that is communicated with the second oil suction path 89 and two exhaust ports 95,96 that are communicated with the second oily drain passageway 90.And, in this shell 91, move supportedly freely as the guiding valve 97 of moving body, the 97b of valve portion that on this guiding valve 97, is formed with first mouthful 92 and suction port 94, can be communicated with and interdicts the 97a of valve portion, second mouthful 93 of (disconnection) and suction port 94 with exhaust port 95, can be communicated with exhaust port 96 and interdict.And, on shell 91, be formed with in each axial end with first pressure port 99 that is communicated with from first tributary circuit 98 as first oil circuit, 32 branches of first fluid path and with second pressure port 101 that is communicated with from second tributary circuit 100 as second oil circuit, 33 branches of second fluid passage.And, on guiding valve 97, be formed with the valve portion 97c and effect valve portion 97d from the hydraulic pressure of second tributary circuit 100 of effect from the hydraulic pressure of first tributary circuit 98.

Therefore, path switching device 86, pressure difference according to first fluid path (first oil circuit 32) and second fluid passage (second oil circuit 33) moves guiding valve 97, can switch the inflow direction and the discharge direction of the fluid in the first fluid path and second fluid passage thus.Promptly, when the hydraulic pressure as first oil circuit 32 of first fluid path likens to is that the hydraulic pressure of second oil circuit 33 of second fluid passage is when high, the hydraulic pressure of first oil circuit 32 acts on the 97c of valve portion from first pressure port 99 by first tributary circuit 98, so guiding valve 97 moves to the right in Fig. 1 and stops on first mobile position.Like this, make first mouthful 92 and exhaust port 95 connections by the 97a of valve portion, and make second mouthful 93 and suction port 94 connections by the 97b of valve portion, the hydraulic oil that second oil sucks path 89 flows in second oil circuit 33 by suction port 94 and second mouthful 93, and the hydraulic oil of first oil circuit 32 flows in the second oily drain passageway 90 by first mouthful 92 and exhaust port 95.

On the other hand, when the hydraulic pressure of second oil circuit 33 is higher than the hydraulic pressure of first oil circuit 32, the hydraulic pressure of second oil circuit 33 acts on the 97d of valve portion from second pressure port 101 by second tributary circuit 100, so guiding valve 97 moves to the left in Fig. 1 and stops on second mobile position.Like this, make first mouthful 92 and exhaust port 94 connections by the 97a of valve portion, and make second mouthful 93 and exhaust port 96 connections by the 97b of valve portion, the hydraulic oil that oil sucks path 83 flows in first oil circuit 32 by suction port 94 and first mouthful 92, and the hydraulic oil of second oil circuit 33 flows in the oily drain passageway 85 by second mouthful 93 and exhaust port 96.

In addition, the second oily drain passageway 90 is branched off into first oily drain passageway 85 and the oily peripheral passage 88, and the part of the oil of discharging from oil pump 22 flows to the oily supply unit 84 by the first oily drain passageway 85, and remaining oil flows to oily peripheral passage 88.Flow to the oil in the oily peripheral passage 88, collaborate and return second oil to suck path 89 with the oil that sucks path 83 from first oil.On oily peripheral passage 88, be provided with control valve 87.This control valve 87 is a flow rate regulating valve, by adjusting its aperture, the amount of flow of oil mobile in oily peripheral passage 88 is adjusted.The oil mass that is fed into oily supply unit 84 changes slightly according to operating conditions, but be roughly constant basis, and therefore, control valve 87 is adjusted by the amount of flow to the oil that flows through oily peripheral passage 88, can be to adjusting from the spray volume of oil pump 22.

Here, the work to the oil pump 22 of above-mentioned present embodiment is elaborated.

In the oil pump 22 of present embodiment, as shown in Figure 1 to Figure 3, when bent axle 12 was passed to input shaft 14 via dampening arrangement 13, the moment of torsion of this input shaft 14 was passed to first rotary component 25 from the rotary valve 27 of oil pump 22 via swivel plate 24 at the moment of torsion of motor 11.At this moment, adjust by 87 pairs of spray volumes of control valve from oil pump 22, can limit the mobile of each piston 38a～38h, the moment of torsion of first rotary component 25 is delivered to second rotary component 36 from cam 26 via piston 38a～38h, then is delivered to output shaft 45 via dunnage 44 from this second rotary component 36.

Promptly, first rotary component 25 and second rotary component 36 be (direction that arrow is represented among Fig. 2) rotation in the counterclockwise direction in Fig. 2, when the rotational speed V1 of first rotary component 25 is bigger than the rotational speed V2 of second rotary component 36, oil pump 22 make second rotary component 36 with respect to first rotary component 25 along opposite direction, be the clockwise direction rotation.Therefore, for example, from the state that Fig. 2 represents, roller 39f rotates to camming surface 26a from camming surface 26d, piston 38f is moved laterally from oil hydraulic cylinder 37f make the 41f of grease chamber enlarge.At this moment, the 41f of grease chamber is communicated with attachment hole 42f, connecting groove 34b, attachment hole 35b, the second intercommunicating pore 30a, second oil circuit 33.On the other hand, the state from Fig. 2 represents for example, because roller 39h rotates to camming surface 26b from camming surface 26a, makes piston 38h make the 41h of grease chamber dwindle to the medial movement of oil hydraulic cylinder 37h.At this moment, the 41h of grease chamber is communicated with attachment hole 42h, connecting groove 34a, attachment hole 35a, first intercommunicating pore 29, first oil circuit 32.

Under this situation,, from the 41f of grease chamber second oil circuit 33 is acted on attraction forces, and, first oil circuit 32 is acted on compressive forcees from the 41h of grease chamber because the 41h of grease chamber dwindles because the 41f of grease chamber enlarges.Therefore, as previously mentioned, in path switching device 86, the hydraulic pressure of first oil circuit 32 becomes than the hydraulic pressure height of second oil circuit 33, makes guiding valve 97 move to first mobile position.Then, oil from oily peripheral passage 88 flows in the second oil suction path 89, and the oil of oily storage part 82 also sucks path 83 by first oil and flows to second oily the suction in the path 89, flow in second oil circuit 33 by suction port 94 and second mouthful 93, be inhaled into the 41f of grease chamber.On the other hand, the oil of the 41h of grease chamber flows to the second oily drain passageway 90 by first mouthful 92 and exhaust port 95 from first oil circuit 32, and a part is ejected into oily supply unit 84 by the first oily drain passageway 85, and remaining flowing in the oily peripheral passage 88.

At this moment, make control valve 87 under the situation of full-gear, the flow of oil that flows through oily peripheral passage 88 is unrestricted, and flow resistance is little, and the flow resistance of oil that is ejected into the second oily drain passageway 90 from the 41h of grease chamber is also little.Therefore, the roller 39h of piston 38h from camming surface 26a when camming surface 26b rotates, the resistance of piston 38h when the medial movement of oil hydraulic cylinder 37h is also little, with respect to (clockwise direction among Fig. 2) rotation that becomes easily in opposite direction of first rotary component, 25, the second rotary components 36.Its result is, moment of torsion transmits to output shaft 45 by oil pump 22 from input shaft 14 hardly, and output shaft 45 does not rotate, and vehicle is a halted state.On the other hand, if the aperture of control valve 87 is reduced gradually, the flow resistance that then flows through the oil of oily peripheral passage 88 increases, the flow resistance that is ejected into the oil of the second oily drain passageway 90 from the 41h of grease chamber also increases, the resistance of piston 38h when the medial movement of oil hydraulic cylinder 37h also increases, also increase by the moment of torsion that oil pump 22 is passed to output shaft 45 from input shaft 14, output shaft 45 begins rotation, vehicle startup.That is, oil pump 22 can play a role as launch device by adjusting the aperture of control valve 87.

In addition, if make control valve 87 become full-shut position, the flow that then flows through the oil of oily peripheral passage 88 becomes 0, is all supplied with to oily supply unit 84 from the oil of oil pump 22 ejections, and the consumed energy of oil pump 22 is suppressed.

In addition, in the job description of above-mentioned oil pump 22, only the work to piston 38f, roller 39f, the 41f of grease chamber and piston 38h, oil hydraulic cylinder 37h, the 41h of grease chamber is illustrated, but also carries out same work by cam 26 in whole piston 38a～38h, oil hydraulic cylinder 37a～37h, the 41a～41h of grease chamber.

And when the moment of torsion of input shaft 14 was passed to output shaft 45 by oil pump 22, the moment of torsion of output shaft 45 was passed to stepless speed variator 58 via forward-reverse switching device 51, here slowed down with the predetermined gear ratio of setting.Moment of torsion by stepless speed variator 58 has slowed down is passed to differential mechanism 66 via gear drive 65, is passed to wheel 68 via live axle 67.

On the other hand, engine brake is done the time spent on vehicle, in oil pump 22, first rotary component 25 and second rotary component 36 be (among Fig. 2 by the direction shown in the arrow) rotation in the counterclockwise direction in Fig. 2, but the rotational speed V1 of first rotary component 25 becomes littler than the rotational speed V2 of second rotary component 36.That is, with respect to second rotary component, 36, the first rotary components 25 in opposite direction, i.e. rotation counterclockwise.Therefore, for example, because roller 39f rotates to camming surface 26c from camming surface 26d, piston 38f moves laterally from oil hydraulic cylinder 37f and makes the 41f of grease chamber enlarge.At this moment, the 41f of grease chamber is communicated with attachment hole 42f, connecting groove 34c, attachment hole 35c, first intercommunicating pore 29, first oil circuit 32.On the other hand, for example, because roller 39h rotates to camming surface 26d from camming surface 26a, piston 38h makes the 41h of grease chamber dwindle to the medial movement of oil hydraulic cylinder 37h.At this moment, the 41h of grease chamber is communicated with attachment hole 42h, connecting groove 34b, attachment hole 35b, the second intercommunicating pore 30a, second oil circuit 33.

Under this situation,, act on attraction forces from the 41f of grease chamber to first oil circuit 32, and, act on compressive forcees to second oil circuit 33 from the 41h of grease chamber because the 41h of grease chamber dwindles because the 41f of grease chamber enlarges.Therefore, as preceding institute, in path switching device 86, the hydraulic pressure of second oil circuit 33 becomes than the hydraulic pressure height of first oil circuit 32, and guiding valve 97 moves to second mobile position.And, oil from oily peripheral passage 88 flows in the second oil suction path 89, and the oil of oily storage part 82 also sucks path 83 from first oil and flows to second oil and suck the path 89, flows to first oil circuit 32 by suction port 94 and first mouthful 92, and is inhaled into the 41f of grease chamber.On the other hand, the oil of the 41h of grease chamber flows to the second oily drain passageway 90 by second mouthful 93 and exhaust port 96 from second oil circuit 33, and a part is ejected into oily supply unit 84 by the first oily drain passageway 85, remainingly flows to oily peripheral passage 88.

In such embodiment 1 hydraulic pressure installation, first rotary component 25 and second rotary component 36 are rotated setting freely relatively with same central hub O, first rotary component 25 is provided with cam 26; On second rotary component 36, relatively be provided with piston 38a～38h, push piston 38a～38h by compression disc spring 40a～40h it is contacted with cam 26 with cam 25; Second rotary component 36 is provided with the 41a～41h of grease chamber that the mobile volume that is accompanied by piston 38a～38h enlarges/dwindles; Be provided with first fluid path (first oil circuit 32) and second fluid passage (second oil circuit 33) with respect to the 41a of this grease chamber～41h oil flows into or discharges; Be provided with path switching device 86, this path switching device 86 switches the inflow direction of the oil in the first fluid path and second fluid passage and discharges direction according to the pressure difference of this first fluid path and second fluid passage.

Therefore, switch the inflow direction and discharge direction of oil according to the pressure difference of the first fluid path and second fluid passage by path switching device 86, thus, each rotary component 25 no matter, how 36 sense of rotation can both be ejected into oil predetermined oil circuit (the second oily drain passageway 90), thus, can be to forward-reverse switching device 51 as oily supply unit 84, the hydraulic control portions of stepless speed variator 58 etc. suitably supply with oil, can prevent the sintering of the clutch in the forward-reverse switching device 51, the generation of the impact during engaging can prevent band fracture in the stepless speed variator 58 etc.In addition, on oily path, do not use safety check, can suppress the pressure loss thus, the generation of the cavitation erosion when suppressing the oil suction, the work bad (cam misses the timing phenomenon) of piston 38a～38h, and can improve mechanical efficiency.And, do not need special control, actuator etc., simplification that can implementation structure.

In addition, in embodiment 1, as path switching device 86, the pressure difference that is provided with according to first fluid path (first oil circuit 32) and second fluid passage (second oil circuit 33) moves, thereby the moving body of the inflow direction of the oil of the switching first fluid path and second fluid passage and discharge direction is a guiding valve 97, this guiding valve 97 is moved freely in first mobile position and second mobile position, wherein, first mobile position be with the first fluid path as the discharge direction of oil and position that second fluid passage is switched as the inflow direction of oil, second mobile position is as the inflow direction of oil and the position that second fluid passage is switched as the discharge direction of oil with the first fluid path.

Therefore, pressure difference according to first oil circuit 32 and second oil circuit 33, guiding valve 97 is moved in first mobile position and second mobile position, thus, can switch the inflow direction of the oil in first oil circuit 32 and second oil circuit 33 and the discharge direction of oil, can suitably carry out the suction and the ejection of oil by simple structure.

In addition, in embodiment 1, as path switching device 86, on shell 91, be provided with first mouthful 92 that is communicated with first oil circuit 32 as the first fluid path, and second mouthful 93 of being communicated with second oil circuit 33 as second fluid passage, and be provided with suction port 94 that is communicated with oil suction path 83 and the exhaust port 95 that is communicated with

oily drain passageway

85,96, can switch first mouthful 92 and second mouthfuls 93 and suction port 94 and exhaust port 95 by guiding valve 97, connected relation between 96, and be provided with the pressure that makes first oil circuit 32 and act on first pressure port 99 on the guiding valve 97, act on second pressure port 101 on the guiding valve with the pressure that makes second oil circuit 33.

Therefore, act on the guiding valve 97 by pressure port 99,101 by the hydraulic pressure that makes first oil circuit 32 and second oil circuit 33, can according to its pressure official post guiding valve 97 in first mobile position or second mobile position move, by moving of this guiding valve 97, the connected relation between first mouthful 92 and second mouthfuls 93 and suction port 94 and the

exhaust port

95,96 can be switched, the suction and the ejection of oil can be suitably carried out.

In addition, in embodiment 1, be provided with control valve 87 in the path switching device 86, this control valve 87 sucks path 83 via oil and is connected in oily storage part 82, and be connected in oily supply unit 84 via oily drain passageway 85, in oily drain passageway 85, the amount of flow of oil controlled.Therefore, flow by the oil in 87 pairs of oily drain passageways 85 of this control valve is adjusted, can be adjusted at the moment of torsion transmission capacity between first rotary component 25 and second rotary component 36, the suction and the ejection of oil can be suitably carried out, and the moment of torsion transmission between first rotary component 25 and second rotary component 36 can be suitably be adjusted at.

In addition, in embodiment 1, on first rotary component 25, be connected with input shaft 14, on second rotary component 36, be connected with output shaft 45, rotational speed by first rotary component 25 and second rotary component 36 is poor, make that piston 38a～38h moves back and forth, the pressure change of the 41a～41h of fluid chamber, thereby carry out the suction and the ejection of oil by the first fluid path and second fluid passage.Therefore, can guarantee the spray volume of suitable oil based on first rotary component 25 and second rotary component, 36 rotational speed differences.

Embodiment 2

Fig. 4 is the summary construction diagram of the oil pump of the related hydraulic pressure installation of expression embodiments of the invention 2, Fig. 5 is the V-V sectional drawing of Fig. 4, Fig. 6 is the VI-VI sectional drawing of Fig. 4, Fig. 7 is the sectional drawing of the path of solid of rotation of embodiment 2 oil pump when switching, and Fig. 8 is the sectional drawing of rotational position of solid of rotation of expression embodiment's 1 oil pump.In addition, the parts with explanation are in the foregoing embodiments had the identical symbol of the parts mark of identical functions and omit repeat specification.

In embodiment 2, to shown in Figure 6,, in the space that is surrounded by two

next doors

20a, 20b, be equipped with oil pump 111 as the hydraulic pressure installation of present embodiment in the inside of housing as Fig. 4.In this oil pump 111, make its rotation freely at the next door of rear case 20 20b via bearing 16d supporting sleeve 23, on sleeve pipe 23, be fixed with swivel plate 24, on this swivel plate 24, be fixed with first rotary component 25.And, be provided with cam 26 at the inner peripheral surface of this first rotary component with

camming surface

26a, 26b, 26c, 26d.

In addition, engage the rotary valve 112 that cylindrical shape is arranged on swivel plate 24, outer circumferential face, joint that the end plate 28 of input shaft 14 is entrenched in this rotary valve 112 are one.This rotary valve 112 circumferentially is formed with four connecting

groove

113a, 113b, 113c, 113d on its outer circumferential face edge, and is formed with

attachment hole

114a, 114b, 114c, the 114d that is communicated with this connecting

groove

113a, 113b, 113c, 113d at inner peripheral surface.

This rotary valve 112 rotates chimeric freely second rotary component 36 that has at its outer circumferential face.This second rotary component 36 is formed with eight oil hydraulic cylinder 37a～37h at peripheral part with the interval of circumferential equalization, moves on each oil hydraulic cylinder 37a～37h and is supported with piston 38a～38h freely.And, be equipped with roller 39a～39h at the front end of this each piston 38a～38h.In addition, clamped compression disc spring 40a～40h in each oil hydraulic cylinder 37a～37h, roller 39a～39h of each oil hydraulic cylinder 37a～37h is urged on

camming surface

26a, 26b at cam 26,26c, the 26d by the active force of each compression disc spring 40a～40h.And, between each piston 38a～38h and each oil hydraulic cylinder 37a～37h, be formed with the 41a～41h of grease chamber.In addition, the 41a～41h of this grease chamber can be communicated with connecting

groove

113a, 113b, 113c, 113d by attachment hole 42a～42h.

In addition, be fixed with connecting cylinder 43 on second rotary component 36, this connecting cylinder 43 is chimeric with the dunnage 44 that is engaged in output shaft 45 by spline 47, thus, connecting cylinder 43 and dunnage 44, promptly second rotary component 36 and output shaft 45 can one be connected rotatably.

On the oil pump 111 of present embodiment, as make oil (oil) inflow as fluid or the first fluid path of discharging with respect to the 41a～41h of fluid chamber, be provided with

attachment hole

114a, 114c, connecting

groove

113a, 113c, attachment hole 42a～42h, and, be provided with attachment hole 114b, 114d, connecting groove 113b, 113d, attachment hole 42a～42h as second fluid passage.In the interior perimembranous of rotary valve 112, rotating the chimeric freely solid of rotation 115 that constitutes path switching device that has together in the heart.This solid of rotation 115 according to the pressure difference of the first fluid path and second fluid passage, switches the inflow direction of the fluid in the first fluid path and second fluid passage and discharges direction.In addition, the amount of flow of the oil in 87 pairs of oily peripheral passages 88 of control valve is controlled.

In solid of rotation 115, discharge chamber 116 from the end face of a side to its central part formation, and the outer circumferential side in this discharge chamber 116 is formed with two suction chamber 117a, 117b.And, the holder 118 of cylindrical shape runs through in the sleeve pipe 23, its end is embedded in discharge chamber 116 and fixes, formation, and forms from being communicated to the suction oil circuit 120 of

suction chamber

117a, 117b between sleeve pipe 23 and the holder 118 to the discharge oil circuit 119 of discharging chamber 116 from the internal communication of holder 118.And, discharge chamber 116 and be communicated with the second oily drain passageway 90 via discharging oil circuit 119, and can via

attachment hole

121a, 121b, 121c, 121d be communicated with as attachment hole 114a, the 114c of first fluid path or as attachment hole 114b, the 114d of second fluid passage.In addition,

suction chamber

117a, 117b are communicated with the second oil suction path 89 via sucking oil circuit 120, and can via

attachment hole

122a, 122b be communicated with as 114a, the 114c of first fluid path or as attachment hole 114b, the 114d of second fluid passage.

In addition, between rotary valve 112 and solid of rotation 115, be provided with first pressure chamber 123a, the 123b of connection as attachment hole 114a, the 114c of first fluid path, and between rotary valve 112 and solid of rotation 115, be provided with second pressure chamber 124a, the 124b of connection as attachment hole 114b, the 114d of second fluid passage.That is, solid of rotation 115, circumferentially all uniformly-spaced being formed with two

notch

115a, 115b, and rotary valve 112 is formed with jut 112a, the 112b that engages with this

notch

115a, 115b at its peripheral part at its peripheral part.Therefore, though solid of rotation 115 can rotate relatively with respect to rotary valve 112 because the end face of

notch

115a, 115b and jut 112a, the 112b butt of rotary valve 112, so this slewing area is restricted.And, marked off first 123a of pressure chamber, 123b and second 124a of pressure chamber, 124b by this notch 115a, 115b.And first 123a of pressure chamber, 123b are communicated with

attachment hole

114a, 114c via

connectivity slot

115c, 115d, and second 124a of pressure chamber, 124b are communicated with attachment hole 114b, 114d via

connectivity slot

115e, 115f.

Therefore, pressure difference according to first fluid path (

attachment hole

114a, 114c) and second fluid passage (attachment hole 114b, 114d), solid of rotation 115 rotates, and can switch the inflow direction and the discharge direction of the fluid in the first fluid path and second fluid passage thus.Promptly, when the hydraulic pressure as attachment hole 114a, the 114c of first fluid path likens to is that the hydraulic pressure of attachment hole 114b, 114d of second fluid passage is when high, the hydraulic pressure of

attachment hole

114a, 114c acts on first 123a of pressure chamber, the 123b by

connectivity slot

115c, 115d, therefore, solid of rotation 115 rotates in Fig. 5 and Fig. 6 along clockwise direction, at notch 115a, the primary importance of the end face of 115b and

jut

112a, 112b butt stops.Like this,

attachment hole

121a, 121c and

attachment hole

114a, 114c are communicated with, and

attachment hole

122a, 122b and attachment hole 114b, 114d are communicated with, the oil that second oil sucks path 89 flows in second fluid passage by sucking oil circuit 120 and

suction chamber

117a, 117b, and the oil of first fluid path flows in the second oily drain passageway 90 by discharging chamber 116 and discharging oil circuit 119.

On the other hand, liken hydraulic pressure into attachment hole 114a, the 114c of first fluid path to when high at hydraulic pressure as attachment hole 114b, the 114d of second fluid passage, as shown in Figures 7 and 8, the hydraulic pressure of attachment hole 114b, 114d acts on second 124a of pressure chamber, the 124b by

connectivity slot

115e, 115f, therefore, solid of rotation 115 rotates in Fig. 7 and Fig. 8 in the counterclockwise direction, stops in the second place of the end face of

notch

115a, 115b and

jut

112a, 112b butt.Like this,

attachment hole

121b, 121d and attachment hole 114b, 114d are communicated with, and

attachment hole

122a, 122b and

attachment hole

114a, 114c are communicated with, the oil that second oil sucks path 89 flows in the first fluid path by sucking oil circuit 120 and

suction chamber

117a, 117b, and the oil of second fluid passage flows in the second oily drain passageway 90 by discharging chamber 116 and discharging oil circuit 119.

In addition, the second oily drain passageway 90 branches into first oily drain passageway 85 and the oily peripheral passage 88, and the part of the oil of discharging from oil pump 22 flows to the oily supply unit 84 by the first oily drain passageway 85, and remainingly flows to oily peripheral passage 88.Flowed into the oil of oily peripheral passage 88 and sucked the oil interflow of path 83 from first oil and return the second oily path 89 that sucks.On oily peripheral passage 88, be provided with control valve 87.This control valve 87 is a flow rate regulating valve, by its aperture is adjusted, comes the amount of flow of the oil that flows through oily peripheral passage 88 is adjusted, thus, can be to adjusting from the spray volume of oil pump 111.

Here, the work to the oil pump 111 of above-mentioned present embodiment has been described in detail.

In the oil pump 111 of present embodiment, extremely shown in Figure 8 as Fig. 4, first rotary component 25 and second rotary component 36 be (direction indicated by the arrow among Fig. 5) rotation in the counterclockwise direction in Fig. 5, when the rotational speed V1 of first rotary component 25 is bigger than the rotational speed V2 of second rotary component 36, second rotary component 36 with respect to first rotary component 25 relatively in opposite direction, be the clockwise direction rotation.Therefore, from state shown in Figure 5, for example, roller 39f rotates to camming surface 26a from camming surface 26d, piston 38f is moved laterally from oil hydraulic cylinder 37f make the 41f of grease chamber enlarge.At this moment, the 41f of grease chamber is communicated with attachment hole 42f, connecting groove 113b, attachment hole 114b.On the other hand, for example,, make piston 38h make the 41h of grease chamber dwindle to the medial movement of oil hydraulic cylinder 37h because roller 39h rotates to camming surface 26b from camming surface 26a.At this moment, the 41h of grease chamber is communicated with attachment hole 42h, connecting groove 113a, attachment hole 114a.

Under this situation because the 41f of grease chamber enlarges, from the 41f of grease chamber to attachment hole 114b effect attraction force, and owing to the 41h of grease chamber dwindles, from the 41h of grease chamber to attachment hole 114a effect compressive force.Therefore, as previously mentioned, the hydraulic pressure of attachment hole 114a becomes than the hydraulic pressure height of attachment hole 114b, the hydraulic pressure of attachment hole 114a on first 123a of pressure chamber, thereby make solid of rotation 115 along the clockwise direction among Fig. 6 rotation and move to primary importance.And, oil from oily peripheral passage 88 flows in the second oil suction path 89, and, the oil of oil storage part 82 also sucks path 83 by first oil and flows in the second oil suction path 89, and, be inhaled into the 41f of grease chamber by attachment hole 122b, attachment hole 114b, connecting groove 113b, attachment hole 42f by sucking oil circuit 120 and suction chamber 117b.On the other hand, oil among the 41h of grease chamber is by attachment hole 42h, connecting groove 113a, attachment hole 114a, attachment hole 121a, flow to the second oily drain passageway 90 by discharging oil circuit 119 from discharging chamber 116, part oil is ejected into oily supply unit 84 by the first oily drain passageway 85, and remaining flowing in the oily peripheral passage 88.

At this moment, control valve 87 is become under the situation of full-gear, the flow of oil that flows through oily peripheral passage 88 is unrestricted, flow resistance is less, and the flow resistance of oil that is ejected into the second oily drain passageway 90 from the 41h of grease chamber is also less.Therefore, the roller 39h of piston 38h from camming surface 26a when camming surface 26b rotates, the resistance of piston 38h when the medial movement of oil hydraulic cylinder 37h is also little, with respect to (being clockwise direction among Fig. 5) rotation that becomes easily in opposite direction of first rotary component, 25, the second rotary components 36.Consequently, moment of torsion transmits to output shaft 45 by oil pump 22 from input shaft 14 hardly, and output shaft 45 does not rotate, and vehicle becomes halted state.On the other hand, if reduce the aperture of control valve 87 gradually, the flow resistance that then flows through the oil of oily peripheral passage 88 increases, also increase to the flow resistance of the oil of second oily drain passageway 90 ejections from the 41h of grease chamber, the resistance of piston 38h when the medial movement of oil hydraulic cylinder 37h also increases, also increase by the moment of torsion that oil pump 22 is delivered to output shaft 45 from input shaft 14, output shaft 45 begins rotation, vehicle startup.That is,, can make the function of oil pump 22 performance launch device by the aperture of control valve 87 is adjusted.In addition, if make control valve 87 become full-shut position, the flow that then flows through the oil of oily peripheral passage 88 becomes 0, and the oil that sprays from oil pump 22 is all supplied to oily supply unit 84, and the consumed energy of oil pump 22 is suppressed.

On the other hand, first rotary component 25 and second rotary component 36 be (direction that arrow is represented among Fig. 5) rotation in the counterclockwise direction in Fig. 5, in the rotational speed V1 of first rotary component 25 rotational speed V2 hour than second rotary component 36, with respect to second rotary component, 36, the first rotary components 25 relatively in opposite direction, i.e. rotation counterclockwise.Therefore, from state shown in Figure 5, for example,, piston 38f is moved laterally from oil hydraulic cylinder 37f make the 41f of grease chamber enlarge because roller 39f rotates to camming surface 26c from camming surface 26d.At this moment, the 41f of grease chamber is communicated with attachment hole 42f, connecting groove 113c, attachment hole 114c.And, for example,, make piston 38h make the 41h of grease chamber dwindle to the medial movement of oil hydraulic cylinder 37h because roller 39h rotates to camming surface 26d from camming surface 26a from state shown in Figure 5.At this moment, the 41h of grease chamber is communicated with attachment hole 42h, connecting groove 113b, attachment hole 114b.

Under this situation because the 41f of grease chamber enlarges, from the 41f of grease chamber to attachment hole 114c effect attraction force, and owing to the 41h of grease chamber dwindles, from the 41h of grease chamber to attachment hole 114b effect compressive force.Therefore, as previously mentioned, the hydraulic pressure of attachment hole 114b becomes than the hydraulic pressure height of attachment hole 114c, the hydraulic pressure of attachment hole 114b on second 124b of pressure chamber, thereby make solid of rotation 115 in Fig. 8, rotate, move to the second place to counter clockwise direction.And, oil from oily peripheral passage 88 flows in the second oil suction path 89, and the oil of oily storage part 82 also sucks path 83 by first oil and flows to the second oil suction path 89, by sucking oil circuit 120 and suction chamber 117b and being inhaled into the 41f of grease chamber by attachment hole 122b, attachment hole 114c, connecting groove 113c, attachment hole 42f.On the other hand, the oil of the 41h of grease chamber is by attachment hole 42h, connecting groove 113b, attachment hole 114b, attachment hole 121b, and flow to the second oily drain passageway 90 by discharging oil circuit 119 from discharging chamber 116, part oil is ejected in the oily supply unit 84 by the first oily drain passageway 85, and remaining flowing in the oily peripheral passage 88.

In such embodiment 2 hydraulic pressure installation, first rotary component 25 and second rotary component 36 are rotated setting freely relatively with same central hub O, first rotary component 25 is provided with cam 26, on second rotary component 36, relatively be provided with piston 38a～38h with cam 26, by compression disc spring 40a～40h pushing piston 38a～38h it is contacted with cam 26, second rotary component 36 is provided with follows moving of piston 38a～38h, 41a～the 41h of grease chamber that volume enlarges/dwindles, be provided with first fluid path (the attachment hole 114a that makes oil flow into or discharge with respect to the 41a～41h of this grease chamber, 114c) and second fluid passage (attachment hole 114b, 114d), be provided with solid of rotation 115, this solid of rotation 115 switches the inflow direction of the oil in the first fluid path and second fluid passage and discharges direction according to the pressure difference of this first fluid path and second fluid passage.

Therefore, by solid of rotation 115, switch the inflow direction of oil and discharge direction according to the pressure difference of the first fluid path and second fluid passage, each rotary component 25 no matter, 36 sense of rotation how, oil can both be supplied to predetermined oil circuit (the second oily drain passageway 90), thus, can be to forward-reverse switching device 51 as oily supply unit 84, the hydraulic control portions of stepless speed variator 58 etc. suitably supply with oil, can prevent the sintering of the clutch in the forward-reverse switching device 51, the generation of the impact during engaging can prevent band fracture in the stepless speed variator 58 etc.In addition, in oily path, do not use safety check, thus, can suppress the pressure loss, therefore, the generation of the cavitation erosion in the time of can suppressing the oil suction, the work bad (cam misses the timing phenomenon) of piston 38a～38h, and can improve mechanical efficiency.

In addition, in embodiment 2, inboard at second rotary component 36 is supported solid of rotation 115 with one heart freely rotatably, on this solid of rotation 115, be provided with and be communicated with the second oil suction path 89 and can be communicated with the first fluid path or the discharge chamber 116 of second fluid passage, with be communicated with the second oily drain passageway 90 and can be communicated with the first fluid path or the suction chamber 117a of second fluid passage, 117b, and, be provided with the pressure that makes the first fluid path and act on first 123a of pressure chamber that this solid of rotation 115 can be rotated, 123b, act on second 124a of pressure chamber that this solid of rotation 115 can be rotated with the pressure that makes second fluid passage, 124b can be according to the rotational position of solid of rotation 115 to first fluid path and second fluid passage and suction chamber 116 and discharge chamber 117a, connected relation between the 117b switches.

Therefore, space utilization efficient improves, miniaturization that can implement device, and can guarantee that the opening area of oil circuit is bigger, therefore, the pressure loss can further be suppressed, in addition, because solid of rotation and the 36 relative rotations of second rotary component are freely, so can prevent that work is bad.And, pressure difference according to

attachment hole

114a, 114c and attachment hole 114b, 114d, hydraulic pressure acts on the solid of rotation 115 via first 123a of pressure chamber, 123b or second 124a of pressure chamber, 124b, make this solid of rotation 115 move to first mobile position and second mobile position, thereby can switch the discharge direction of the inflow direction and the oil of the oil among

attachment hole

114a, 114c and attachment hole 114b, the 114d, can suitably carry out the suction and the ejection of oil by simple structure.

Embodiment 3

Fig. 9 is the summary construction diagram of path switching device of the oil pump of the hydraulic pressure installation that is applicable to that expression embodiments of the invention 3 are related.In addition, the overall structure of the hydraulic pressure installation of present embodiment and the above embodiments 1 are roughly the same, use Fig. 1 and Fig. 2 to describe, and in this embodiment to having the identical reference character of parts mark of identical function with the parts that illustrated, and the repetitive description thereof will be omitted.

Oil pump as embodiment 3 hydraulic pressure installation, its structure as shown in Figures 1 and 2, first rotary component 25 is supported freely with the 36 relative rotations of second rotary component, input shaft 14 is connected in first rotary component 25 via rotary valve 27, on this first rotary component 25, be provided with cam 26, and the piston 38a～38h that moves is freely arranged in second rotary component, 36 upper supports, by compression disc spring 40a～40h this piston 38a～38h is pushed to cam 26, and be connected with output shaft 45.And, on second rotary component 36, be provided with and follow the moving of piston 38a～38h, the 41a～41h of grease chamber that volume enlarges/dwindles, also be provided with first fluid path (first oil circuit 32) and second fluid passage (second oil circuit 33) with respect to the 41a of this grease chamber～41h oil flows into or discharges.

On this oil pump 22, as shown in Figure 9, be provided with the path switching device 131 that its work is controlled.In this path switching device 131, shell 91 is hollow shape, vertically configuration.On this shell 91, be formed with first mouthful 92 of being communicated with and second mouthful 93 of being communicated with second oil circuit 33 as second fluid passage with first oil circuit 32 as the first fluid path.In addition, on shell 91, be formed with suction port 94 that is communicated with the second oil suction path 89 and two

exhaust ports

95,96 that are communicated with the second oily drain passageway 90.And, second pressure port 101 that on shell 91, is formed with first pressure port 99 that is communicated with first tributary circuit 98 and is communicated with second tributary circuit 100 from second oil circuit, 33 branches from first oil circuit, 32 branches.And in this shell 91, guiding valve 97 is moved freely and supports, and is formed with four 97a of valve portion, 97b, 97c, 97d.

In the present embodiment, guiding valve 97 is according to the pressure difference of first oil circuit 32 and second oil circuit 33, this first oil circuit 32 is being moved on as the inflow direction of oil and second mobile position that second oil circuit 33 is switched as the discharge direction of oil freely as the discharge direction of oil and first mobile position that second oil circuit 33 is switched as the inflow direction of oil with first oil circuit 32, and, be supported on first mobile position by the application of force by gravity as application of force unit.Under this situation, as Fig. 1 and shown in Figure 9 so that first pressure port 99 and the 97c of valve portion be positioned at upper side, second pressure port 101 and the 97d of valve portion be positioned at the below mode disposed shell 91.In addition, on first rotary component 25, be connected with input shaft 14, on second rotary component 36, be connected with output shaft 45, when the rotational speed of first rotary component 25 is higher than the rotational speed of second rotary component 36, the oil circuit that will become high pressure is made as first oil circuit 32, and the oil circuit that will become low pressure is made as second oil circuit 33.

In addition, the second oily drain passageway 90 is branched off into first oily drain passageway 85 and the oily peripheral passage 88, and the part of the oil of discharging from oil pump 22 flows to oily supply unit 84 by the first oily drain passageway 85, and remainingly flows to oily peripheral passage 88.Flow to the oil of oily peripheral passage 88 and suck the oil interflow of path 83 from first oil and get back to second oily the suction in the path 89.On oily peripheral passage 88, be provided with control valve 87.This control valve 87 is a flow rate regulating valve, by its aperture is adjusted, can adjust the amount of flow of the oil that flows through oily peripheral passage 88, can be to adjusting from the spray volume of oil pump 22.

Therefore, in path switching device 131, guiding valve 97 since its gravity in shell 91, move to below, i.e. first mobile position and stopping, at this moment, make first mouthful 92 and exhaust port 95 connections by the 97a of valve portion, make second mouthful 93 and suction port 94 connections by the 97b of valve portion.Under this state, if the hydraulic pressure of first oil circuit 32 likens the hydraulic pressure height of second oil circuit 33 that is second fluid passage to, then the hydraulic pressure of first oil circuit 32 acts on the 97c of valve portion from first pressure port 99 by first tributary circuit 98, and therefore, guiding valve 97 is maintained on first mobile position.Therefore, the hydraulic oil that second oil sucks path 89 flows in second oil circuit 33 by suction port 94 and second mouthful 93, and the hydraulic oil of first oil circuit 32 flows in the second oily drain passageway 90 by first mouthful 92 and exhaust port 95.

On the other hand, if the hydraulic pressure of second oil circuit 33 becomes than the hydraulic pressure height of first oil circuit 32, then the hydraulic pressure of second oil circuit 33 is by second tributary circuit 100, act on the 97d of valve portion, therefore from second pressure port 101, guiding valve 97 overcomes gravity and rises, and is moving to second mobile position and stopping.Therefore, make first mouthful 92 and exhaust port 94 connections by the 97a of valve portion, and, make second mouthful 93 and exhaust port 96 connections by the 97b of valve portion, the hydraulic oil that second oil sucks path 89 flows in first oil circuit 32 by suction port 94 and first mouthful 92, and the hydraulic oil of second oil circuit 33 flows in the second oily drain passageway 90 by second mouthful 93 and exhaust port 96.

In such embodiment 3 hydraulic pressure installation, as the path switching device 131 that the work of oil pump is controlled, in shell 91, be provided with guiding valve 97, this guiding valve 97 moves according to the pressure difference of first oil circuit 32 and second oil circuit 33, switch the inflow direction of oil thus and discharge direction, this guiding valve 97 moved be supported on freely on first mobile position and second mobile position, be supported on first mobile position by the application of force by gravity as application of force unit, wherein this first mobile position is the position that first oil circuit 32 is discharged direction and second oil circuit 33 is switched as oily inflow direction as oil, and this second mobile position is that first oil circuit 32 is discharged the position that direction is switched as oily inflow direction and with second oil circuit 33 as oil.

Therefore, by the application of force guiding valve 97 is supported on first mobile position, thus, when oil pump starts, can prevent the adverse current of oil, and, can be as early as possible with the oil ejection and be supplied to oil supply supply unit 84, in addition, vertically dispose by shell 91 guiding valve 97, thereby can make action of gravity on this guiding valve 97, can easily it be supported on first mobile position, simplification that can implementation structure its application of force.

In addition, in embodiment 3, input shaft 14 is connected in first rotary component 25 of oil pump 22, output shaft 45 is connected in second rotary component 36, when the rotational speed of first rotary component 25 was the high high speed of rotational speed than second rotary component 36, the oil circuit that the oil circuit that will become high pressure is made as first oil circuit 32, will become low pressure was made as second oil circuit 33.

Therefore, when motor 11 startings, can prevent the adverse current of the oil in the oil pump, and, can as soon as possible oil be supplied to oily supply unit 84 by this oil pump.

Embodiment 4

Figure 10 is the summary construction diagram of the path switching device on the oil pump of the hydraulic pressure installation that is applicable to that expression embodiments of the invention 4 are related.In addition, the overall structure of the hydraulic pressure installation of present embodiment and the above embodiments 1 are roughly the same, use Fig. 1 and Fig. 2 to describe, and, in this embodiment to having the identical reference character of parts marks of identical function with the parts that illustrated, and the repetitive description thereof will be omitted.

In oil pump, as shown in figure 10, be provided with the path switching device 141 that its work is controlled as embodiment 4 hydraulic pressure installation.In this path switching device 141, shell 91 is hollow shape, be formed with first mouthful 92 of being communicated with and second mouthful 93 of being communicated with second oil circuit 33 with first oil circuit 32, and, be formed with suction port 94 that is communicated with the second oil suction path 89 and two

exhaust ports

95,96 that are communicated with the second oily drain passageway 90.In addition, second pressure port 101 that on shell 91, is formed with first pressure port 99 that is communicated with first tributary circuit 98 and is communicated with second tributary circuit 100 from second oil circuit, 33 branches from first oil circuit, 32 branches.And in this shell 91, guiding valve 97 moves supported freely, is formed with four 97a of valve portion, 97b, 97c, 97d.

In the present embodiment, guiding valve 97 is according to the pressure difference of first oil circuit 32 and second oil circuit 33, on first mobile position and second mobile position, move freely, and, be supported on first mobile position to its application of force and with it by compression disc spring 142 as application of force unit, wherein this first mobile position be with this first oil circuit 32 as the discharge direction of oil and position that second oil circuit 33 is switched as the inflow direction of oil, this second mobile position is as the inflow direction of oil and the position that second oil circuit 33 is switched as the discharge direction of oil with first oil circuit 32.Under this situation, clamped compression disc spring 142 between the end face of first pressure port, 99 sides in shell 91 and the 97c of valve portion in the guiding valve 97.

Therefore, in path switching device 141, because the active force of compression disc spring 142, guiding valve 97 moves to first mobile position and stops, and at this moment, makes first mouthful 92 and exhaust port 95 connections by the 97a of valve portion, makes second mouthful 93 and suction port 94 connections by the 97b of valve portion.Under this state, if the hydraulic pressure of first oil circuit 32 likens the hydraulic pressure height of second oil circuit 33 that is second fluid passage to, then the hydraulic pressure of first oil circuit 32 acts on the 97c of valve portion from first pressure port 99 by first tributary circuit 98, and therefore, guiding valve 97 is maintained on first mobile position.Therefore, the hydraulic oil that second oil sucks path 89 flows in second oil circuit 33 by suction port 94 and second mouthful 93, and the hydraulic oil of first oil circuit 32 flows in the second oily drain passageway 90 by first mouthful 92 and exhaust port 95.

On the other hand, if the hydraulic pressure of second oil circuit 33 becomes than the hydraulic pressure height of first oil circuit 32, then the hydraulic pressure of second oil circuit 33 acts on the 97d of valve portion from second pressure port 101 by second tributary circuit 100, therefore, the active force that guiding valve 97 overcomes compression disc spring 142 moves, and stops on second mobile position.Therefore, make first mouthful 92 and exhaust port 94 connections by the 97a of valve portion, and, make second mouthful 93 and exhaust port 96 connections by the 97b of valve portion, the hydraulic oil that second oil sucks path 89 flows in first oil circuit 32 by suction port 94 and first mouthful 92, and the hydraulic oil of second oil circuit 33 flows in the second oily drain passageway 90 by second mouthful 93 and exhaust port 96.

In such embodiment 4 hydraulic pressure installation, as the path switching device 141 that the work of oil pump is controlled, in shell 91, be provided with guiding valve 97, this guiding valve 97 moves according to the pressure difference of first oil circuit 32 and second oil circuit 33, switch the inflow direction of oil and discharge direction, this guiding valve 97 moved be supported on freely on first mobile position and second mobile position, and, active force by compression disc spring 142 is supported on first mobile position by the application of force, wherein this first mobile position be with this first oil circuit 32 as the discharge direction of oil and position that second oil circuit 33 is switched as the inflow direction of oil, this second mobile position is as the inflow direction of oil and the position that second oil circuit 33 is switched as the discharge direction of oil with first oil circuit 32.

Therefore, active force by compression disc spring 142 is supported on it on first mobile position guiding valve 97 application of forces, thus, when oil pump starts, can prevent the adverse current of oil, and can as soon as possible the oil discharge be supplied in the oily supply unit 84, in addition, by between shell 91 and guiding valve 97, clamping compression disc spring 142, thereby elastic force is acted on this guiding valve 97 it is supported on first mobile position, can realize the workability of guiding valve 97.

Embodiment 5

Figure 11 is the summary structural drawing of the oil pump of the related hydraulic pressure installation of expression embodiments of the invention 5.In addition, the overall structure of the hydraulic pressure installation of present embodiment and the above embodiments 2 are roughly the same, also use Fig. 5 and Fig. 6 to describe except that Figure 11, and, in this embodiment to having the identical reference character of parts marks of identical function with the parts that illustrated, and the repetitive description thereof will be omitted.

In embodiment 5, its structure such as Fig. 5 and Fig. 6, shown in Figure 11, oil pump 151 as hydraulic pressure installation, its

first rotary component

25 and 36 rotations of second rotary component are supported freely, input shaft 14 is connected in first rotary component 25 via rotary valve 27, is provided with cam 26 on this first rotary component 25, and moves support piston 38a～38h freely on second rotary component 36, by compression disc spring 40a～40h this piston 38a～38h is pushed to cam 26, and be connected in output shaft 45.And, on second rotary component 36, be provided with and follow the moving of piston 38a～38h, the 41a～41h of grease chamber that volume enlarges/dwindles, be provided with first fluid path (first oil circuit 32) and second fluid passage (second oil circuit 33) with respect to the 41a of this grease chamber～41h oil flows into or discharges.

In addition, inboard solid of rotation 115 rotations at second rotary component 36 are supported freely, this solid of rotation 115 is provided with and is communicated with the second oil suction path 89 and can be communicated with the first fluid path or the discharge chamber 116 of second fluid passage, be communicated with the second oily drain passageway 90 and can be communicated with the first fluid path or the suction chamber 117a of second fluid passage, 117b, and, be provided with the pressure that makes the first fluid path and act on first 123a of pressure chamber that it can be rotated, 123b, act on second 124a of pressure chamber that it can be rotated with the pressure that makes second fluid passage, 124b, according to the rotational position of solid of rotation 115, can and discharge chamber 117a to first fluid path and second fluid passage and suction chamber 116, connected relation between the 117b switches.

Under this situation, solid of rotation 115 moves to first mobile position (position shown in Figure 6), second mobile position (position shown in Figure 8) according to the pressure difference of the first fluid path and second fluid passage, thus, can switch the discharge direction of the inflow direction and the oil of oil, being provided with between rotary valve 112 and solid of rotation 115 can be with the not shown compression disc spring of solid of rotation 115 application of forces in first mobile position.

And, in the present embodiment, the rear case 20 that constitutes housing 17 and and the swivel plate 24 of first rotary component, 25 one between be provided with break 152 as constraint element.This break 152 can be suitable for friction brake, engage brake, electromagnetic brake etc., when suitable friction brake, engage brake, is suitable for the hydraulic controlling type actuator; When being suitable for electromagnetic brake, be suitable for the electromagnetic control type actuator, each actuator can be controlled by electric control device according to the running state of vehicle.In addition, be connected in oily drain passageway 85 via oily supply passage 154, on this oil supply passage 154, be provided with electromagnetic switch valve 155 as the hydraulic power 153 of fluid feed unit.

In addition, the second oily drain passageway 90 is branched off into first oily drain passageway 85 and the oily peripheral passage 88, and the part of the oil of discharging from oil pump 22 flows to oily supply unit 84 by the first oily drain passageway 85, and remainingly flows to oily peripheral passage 88.Flow into the oil of oily peripheral passage 88 and suck the oil interflow of path 83 from first oil and flow back to the second oily path 89 that sucks.On oily peripheral passage 88, be provided with control valve 87.This control valve 87 is a flow rate regulating valve, can be to adjusting from the spray volume of oil pump 22 by adjusting its aperture.

Therefore, engine-driving, first rotary component 25 and second rotary component 36 are along same direction (counter clockwise direction among Fig. 5) rotation, when the rotational speed of first rotary component 25 was bigger than the rotational speed of second rotary component 36, second rotary component 36 was with respect to (clockwise direction among Fig. 5) rotation relatively in opposite direction of first rotary component 2.Therefore,

piston

38b, 38c, 38f, 38g move laterally from oil

hydraulic cylinder

37b, 37c, 37f, 37g and make the 41b of grease chamber, 41c, 41f, 41g enlarge, and the 41b of grease chamber, 41c, 41f, 41g are communicated with

attachment hole

42b, 42c, 42f, 42g, connecting groove 113b, 113d, attachment hole 114b, 114d.On the other hand,

piston

38h, 38a, 38d, 38e make the 41h of grease chamber, 41a, 41d, 41e dwindle to the medial movement of oil

hydraulic cylinder

37h, 37a, 37d, 37e, and the 41h of grease chamber, 41a, 41d, 41e are communicated with

attachment hole

42h, 42a, 42d, 42e, connecting

groove

113a, 113c,

attachment hole

114a, 114c.

Under this situation, because the 41b of grease chamber, 41c, 41f, 41g enlarge, the 41h of grease chamber, 41a, 41d, 41e dwindle, make the hydraulic pressure of

attachment hole

114a, 114c become than the hydraulic pressure height of attachment hole 114b, 114d, the hydraulic pressure of

attachment hole

114a, 114c makes solid of rotation 115 move to primary importance on first 123a of pressure chamber, 123b.Then, flow to second oil from the oil of oily peripheral passage 88 and suck in the path 89, and the oil of oily storage part 82 also sucks path 83 by first oil and flow to second oil and suck in the path 89, be inhaled into the 41b of grease chamber, 41c, 41f, 41g by sucking oil circuit 120.On the other hand, the oil of the 41h of grease chamber, 41a, 41d, 41e flows in the second oily drain passageway 90 by discharging oil circuit 119, and part oil is ejected in the fluid supply unit 84 by the first oily drain passageway 85, and remaining flowing in the oily peripheral passage 88.

On the other hand, first rotary component 25 and second rotary component 36 are along same direction (counter clockwise direction among Fig. 5) rotation, when the rotational speed of first rotary component 25 than the rotational speed of second rotary component 36 hour, first rotary component 25 is with respect to (being counterclockwise among Fig. 5) rotation relatively in opposite direction of second rotary component 36.Therefore,

piston

38a, 38b, 38e, 38f move laterally from oil

hydraulic cylinder

37a, 37b, 37e, 37f and make the 41a of grease chamber, 41b, 41e, 41f enlarge, the 41a of grease chamber, 41b, 41e, 41f is communicated with

attachment hole

42a, 42b, 42e, 42f, connecting

groove

113a, 113c, attachment hole 114a, 114c.On the other hand,

piston

38c, 38d, 38g, 38h make the 41c of grease chamber, 41d, 41g, 41h dwindle to the medial movement of oil

hydraulic cylinder

37c, 37d, 37g, 37h, and the 41c of grease chamber, 41d, 41g, 41h are communicated with

attachment hole

42c, 42d, 42g, 42h, connecting groove 113b, 113d, attachment hole 114b, 114d.

Under this situation, because the 41a of grease chamber, 41b, 41e, 41f enlarge, the 41c of grease chamber, 41d, 41g, 41h dwindle, make the hydraulic pressure of attachment hole 114b, 114d become than the hydraulic pressure height of

attachment hole

114a, 114c, the hydraulic pressure of

attachment hole

114b, 114c makes solid of rotation 115 move to the second place on second 124a of pressure chamber, 124b.Then, flow to second oil from the oil of oily peripheral passage 88 and suck in the path 89, and the oil of oily storage part 82 also sucks path 83 by first oil and flow to second oil and suck in the path 89, be inhaled into the 41a of grease chamber, 41b, 41e, 41h by sucking oil circuit 120.On the other hand, the oil of the 41c of grease chamber, 41d, 41g, 41h flows in the second oily drain passageway 90 by discharging oil circuit 119, and part oil is ejected in the fluid supply unit 84 by the first oily drain passageway 85, and remainingly flows to oily peripheral passage 88.

In addition, when motor has stopped, the oil pump 151 of present embodiment can being used as motor.That is,, under the state of constraint first rotary component 25, open electromagnetic switch valve 154, make control valve 87 become full-shut position, from hydraulic power 153 ejection hydraulic oil by making break 152 work.Like this, the hydraulic oil of hydraulic power 153 is fed into oily supply unit 84 from oily supply passage 154 by the second oily drain passageway 90, and is fed into oil pump 151.At this moment, active force by compression disc spring is supported on solid of rotation 115 application of forces on first mobile position, thereby make the 41b of grease chamber, 41c, 41f, 41g be communicated with attachment hole 114b, 114d, and the 41h of grease chamber, 41a, 41d, 41e are communicated with

attachment hole

114a, 114c via

attachment hole

42h, 42a, 42d, 42e, connecting

groove

113a, 113c via

attachment hole

42b, 42c, 42f, 42g, connecting groove 113b, 113d.

Therefore, the hydraulic oil of hydraulic power 153 passes through to discharge oil circuit 119 and discharges chamber 116 from the oily supply passage 154 and the second oily drain passageway 89, then is fed into the 41a of grease chamber, 41e by

attachment hole

121a, 121b,

attachment hole

114a, 114c, connecting

groove

113a, 113c, attachment hole 42a, 42e.Like this, hydraulic oil is fed into the 41a of this grease chamber, 41e makes the 41a of grease chamber, 41e enlarge, and

piston

38a, 38e move laterally, thus via the rotation in the counterclockwise direction in Fig. 5 of cam 26 second rotary components 25.At this moment, make the 41c of grease chamber, the oil in the 41g sucks path 89 by second oil and flows back to oily storage part 82.That is, be rotated with respect to first rotary component, 25, the second rotary components 36 that stop, thus, the moment of torsion of second rotary component 36 is delivered to output shaft 45.Therefore, no matter whether motor stops, and by driving oil pump 151, can make output shaft 45 rotations, guarantee can make vehicle driving by this moment of torsion by moment of torsion.In addition, thus the moment of torsion that can obtain output shaft 45 drives subsidiary engine etc.

Like this in embodiment 5 hydraulic pressure installation, support first rotary component 25 and make both relative rotations freely with second rotary component 36, on first rotary component 25, cam 26 is set, and second rotary component 36 is provided with to support and contacts with this cam 25, move piston 38a～38h freely, be provided with the first fluid path and second fluid passage that the 41a～41h of grease chamber that enlarges/dwindle with respect to the mobile volume of following this piston 38a～38h makes oil flow into or discharge, thereby be provided with according to the pressure difference of this first fluid path and second fluid passage and rotate the solid of rotation 151 that switches the flow direction of pressing oil, be provided with the break 152 that first rotary component 25 is retrained, and hydraulic power 153 from hydraulic oil to the first fluid path that supply with is set.

Therefore, when motor has stopped, hydraulic oil is supplied to the 41a～41h of grease chamber from hydraulic power 153 by the second oily drain passageway 90, piston 38a～38h is moved make 25 rotations of second rotary component, thus, the moment of torsion of second rotary component 36 can be outputed to output shaft 45, this oil pump 151 is played a role as motor.

In addition, by between rotary valve 112 and solid of rotation 115, clamping compression disc spring, can be with this solid of rotation 115 to the first mobile position application of force.Therefore, by solid of rotation 115 application of forces are supported on it on first mobile position, under the state that motor has stopped, when making oil pump 151 startings, can make second rotary component 36, can guarantee suitable moment of torsion along the direct rotational direction rotation.

In addition, in each above-mentioned embodiment, support first rotary component 25 and make both relative rotations freely with second rotary component 36, make input shaft 14 be connected in first rotary component 25 via rotary valve 27,112, make output shaft 45 be connected in second rotary component 36, when also making output shaft 45 be connected in first rotary component 25, make input shaft 14 be connected in second rotary component 36 via rotary valve 27,112.

In addition, in each above-mentioned embodiment, as application of force unit, use based on the gravity that vertical configuration produced of guiding valve 97 or the active force of compression disc spring 152, but also other springs such as extension spring or leaf spring or rubber, resin etc. can be used as force application part.In addition, application of force unit can be set with respect to embodiment 2 solid of rotation.

And, in the above embodiments 5, input shaft 14 is connected in first rotary component 25, output shaft 45 is connected in second rotary component 36, can retrain first rotary component 25 by break 152, still, input shaft 14 is being connected in second rotary component 36, output shaft 45 is connected under the situation of first rotary component 25, can retrains by 152 pairs second rotary components 36 of break and get final product.

Utilize possibility on the industry

As previously discussed, hydraulic pressure installation among the present invention is how a kind of sense of rotation of no matter rotary component can both supply fluid to predetermined oil circuit and further realize the raising of mechanical efficiency and further realize the device of the raising of versatility, can be applicable to any one hydraulic pressure installation.

Claims

1. a hydraulic pressure installation is characterized in that, comprising:

Have central hub, relative rotation the 1st rotary component and the 2nd rotary component of setting freely; Be arranged at the cam of described the 1st rotary component; On described the 2nd rotary component, relatively dispose and the radially mobile piston that is provided with freely with described cam; Described piston is pushed so that its press part that contacts with described cam; Be arranged at described the 2nd rotary component, be accompanied by the fluid chamber that the mobile volume of described piston enlarges/dwindles; Flow into or discharge the 1st fluid passage and the 2nd fluid passage of fluid with respect to described fluid chamber; With pressure difference, to the inflow direction of the fluid in described the 1st fluid passage and described the 2nd fluid passage and discharge the path switching device that direction is switched according to described the 1st fluid passage and described the 2nd fluid passage.

2. as the hydraulic pressure installation of claim 1 record, wherein,

Described path switching device has moving body, this moving body moves according to the pressure difference of described the 1st fluid passage and described the 2nd fluid passage, thus the inflow direction and the discharge direction of the fluid in described the 1st fluid passage and described the 2nd fluid passage is switched.

3. as the hydraulic pressure installation of claim 2 record, wherein,

Described moving body moves freely in the 1st mobile position and the 2nd mobile position, and be bearing in described the 1st mobile position by the application of force by application of force unit, described the 1st mobile position be with described the 1st fluid passage as the discharge direction of fluid and described the 2nd fluid passage is switched to the position of the inflow direction of fluid, described the 2nd mobile position is as the inflow direction of fluid and described the 2nd fluid passage is switched to the position of the discharge direction of fluid with described the 1st fluid passage.

4. as the hydraulic pressure installation of claim 3 record, wherein,

Input shaft is connected in described the 1st rotary component, output shaft is connected in described the 2nd rotary component, described application of force unit, with when the rotational speed of described the 1st rotary component is higher than the rotational speed of described the 2nd rotary component, make the mode of the increased pressure of described the 1st fluid passage that is communicated with the fluid supply unit or described the 2nd fluid passage carry out application of force supporting to described moving body.

5. as the hydraulic pressure installation of claim 1 record, wherein,

Described path switching device comprises: housing; The 1st port that be arranged at described housing, is communicated with described the 1st fluid passage; The 2nd port that be arranged at described housing, is communicated with described the 2nd fluid passage; Be arranged at described housing, suck the inhalation port that path is communicated with fluid; The discharge port that be arranged at described housing, is communicated with the fluid drain passageway; The guiding valve that in described housing, is moved freely supporting, the connected relation of described the 1st port and described the 2nd port and described inhalation port and described discharge port is switched; Be arranged at described housing, make the pressure of described the 1st fluid passage act on the 1st pressure port of described guiding valve; Be arranged at described housing, make the pressure of described the 2nd fluid passage act on the 2nd pressure port of described guiding valve.

6. as the hydraulic pressure installation of claim 1 record, wherein,

Described path switching device comprises: the inboard at described the 2nd rotary component is rotated the solid of rotation of supporting freely with one heart; Be arranged at described solid of rotation, suck the suction chamber that path is communicated with and can be communicated with described the 1st fluid passage or described the 2nd fluid passage with fluid; The discharge chamber that is arranged at described solid of rotation, is communicated with the fluid drain passageway and can be communicated with described the 1st fluid passage or described the 2nd fluid passage; Make the pressure of described the 1st fluid passage act on the 1st pressure chamber that described solid of rotation can rotate it; Act on described solid of rotation with the pressure that makes described the 2nd fluid passage and make its 2nd pressure chamber that can rotate,

7. as the hydraulic pressure installation of each record in the claim 1 to 6, wherein,

Described path switching device sucks path via fluid and is connected in the fluid storage part, and be connected in the fluid supply unit via the fluid drain passageway, the control valve that the flow of convection cell is controlled is set on described fluid sucks at least one side in path or the described fluid drain passageway.

8. as the hydraulic pressure installation of claim 1 record, wherein,

Input shaft is connected in the side in described the 1st rotary component and described the 2nd rotary component, output shaft is connected in the opposing party, rotational speed by described the 1st rotary component and described the 2nd rotary component is poor, described piston is moved back and forth, the pressure change of described fluid chamber is carried out the suction and the discharge of fluid by described the 1st fluid passage and described the 2nd fluid passage thus.

9. as the hydraulic pressure installation of claim 1 record, wherein, setting can retrain the constraint element of described the 1st rotary component or described the 2nd rotary component and can supply with the fluid feed unit of fluid to described the 1st fluid passage or described the 2nd fluid passage.